Plaiting machine



' y cs. EZBELENT ETAL 1,713,040

PLAITING MACHINE Filed June 28, 1926 2 Sheets-Sheet l m vewar;

Patented May 14, 1929.

PLAITING MACHINE.

Application. filed .lune E8, 19%,

The present invention relates to plaiting machines of the type comprising two eontinuous and rigid knives which are pivoted at the ends.

According; to the invention, the teeth oit each knife have unequal lengths, the two knives being so disposed. that a long tooth on one l illlll t. corresponds to a short tooth on the other kniil e. This arrangement,

in which is particularly simple, allows of obtaining plaits which are reversed one or several times in the direction ()i their length, although the knives employed or this purpose are continuous and. rigid, and. are not 5 divided lengthwise into separate pivoted sections.

The invention further relates to a device for the lengthwise motion of the knives, thus al'lj'ording varied patterns, for instance go straight plaits comprising alternately reversed parts, checker work, chevrons, dialllOllll -SlltLPQS, sipuire shapes or like patterns,

box plai ts, and the like.

in the ap 'icnded drawings which show by way of example a practical embodiment of the invention:

lfiigr, l is a section of the plaiting machine, with the knives in the :liorwaiwl position.

liig. 2. a plan view Off the knives in their whole length, both knives being assumed contained in the plane of the sheet.

llig'. 2 is a plan view on a larger scale o li a portion of a knife, and

lfiigr. E2 is a like view showiinga niodilicar tion.

Fig. 3 is a vie aiuilog'ous to Fig. 1, with the knives in coiiitact with the formation plates.

ltigs. l, 5 and 6 show portions of plaited :liahric produced by a plaiting machine according to the invention.

Figs. 7 and 8 are respectively an end view and a plan view of the mechanism controlling the lengthwise motion of the knives.

lhe plaiting device herein represented consists, as in the known. machines of two right-angled kniilt'e carriers 1 and 2 extending longitudinally in front of the rollers of the machine, each carrying a continuous knife 3, 1 whose teeth have unequal lengths, each. long tooth 3 l of one knife corresponding to a short tooth 4; or 3* of the other knife.

The said teeth may be formed as shown fill Serial "lll'o.

119,209, and in France September 25, 19M.

on a larger scale in Q. or 2", with equal facility.

The whole :lormed by the two knives 1 and 2 is given a reciprocating motion to the trout and rear by known means in current use upon machines of this type and which do not form part oil this invention. The machine is .liurther )rovided with. the live usual formation plates i. e. the upper formation. plate 10 and the lower formation plate 11. To the ends ol the lower knife carrier 2 are smrured the two side plates 5, one oil. which carries an apparatus 6, known per so, which serves to rotate the piece 2 about the shatl t 7 by means of a reciproeatinn member 30, so that during the :liorward stroke, the lower knife 1-. will be constantly urged to the top and will follow the upper formation plate 10.

The upper knife carrier 1 is rotatable on trunnious 8 mounted upon the plates 5 so as to follow by means of springs 51. the lower liornnition plate, and. its opening); moveinei'it controlled by the device known per se comprising the C-shaped arm 13 re cured to said kniil e carrier and resting .lhrou th the medium oil? a roller upon the plate 12 which is raised by a set oli cams and levers at the proper time and. for a suitable period.

The two knife carriers n'lonnted on the plates 5 are movable with said plates endwise before the rollers ot' the machine by a device acting on the shalt 7 and compre- :ing a cam 15, with a groove 16, which is mounted loose on the end Olli one 0:]? the said rollers, and carries the ratchet wheel 17; said cam is rotated by the link and crank gear 18, 19, 20, 21, the links 18 and 19 being pivoted together by means oil? an ad justable slide 26 serving to regulate the amount of motion. of the link 18 which actuates the pawl 1i" coaching with the ratchet wheel 17, thus regulating the angle through which. the cam is turned at each rotation of the crank 21. A roller 22, en gaged in the groove 16, is mounted on an arm 23 pivoted to a fixed point 2-1 and connected with. the shaft 7 of the lower kni'te carrier 2 by any suitable transmission gear 25 known per It will be observed. that the long teeth of the upper knil'te coact with the lower roller, thus forming underlapping plaits, whilst the short teeth of said knife will ,Thus each underlapping plait is situated between two overlapping plaits.

By rotating the cam 15 to obtain the progressive lengthwise motion of the set of knives before the rollers according as the plaits are produced, overlapping plaits and underlappmg plaits disposed in an inclined line are obtained, and by causing the device to return to its ori inal )osition in like O manner, the chevron pattern which is shown in Fig. is produced. By abrupt longitudinal displacements of the knives the checker work shown inl ig. 5 is obtained, and from the combination of these two above movements results the diamond shaped pattern, Fig. 6.

In the aforesaid machine, both knives are operated at the same time, but it is obvious that the invention is also applicable to machin es in which the knives are successively operated and in such case, the upper knife produces the under-lapping plaits, and the lower knife the overlapping; plaits which are interposed between the underlapping plaitsthroughout the length of the plaitcd work.

Obviously, the invention is not limited to the constructions hereinbefore described. and represented, which are given solely by way of example.

Having now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a plaiting machine, in combination with the rollers of the machine, an upper continuous knife and a lower continuous knife, each knife having adjacent teeth alternately longand short, each long tooth of one knife being arranged to lie opposite to a short tooth of the other knife, two knifecarriers supporting said knives and adapted to be given a reciprocating movement towards and 'awayfrom the rollers, means i for crossing the teeth of the knives during their stroke towards the rollers in such manner that long tooth of one knife meshes with a short tooth of the other knife and means for opening the knives during their stroke away from the rollers.

' 2. In a plaiting machine, in combination with the rol ers of the machine, an upper continuous knife and a lower continuous knife, each knife having adjacent teeth alternately long and short, each long tooth of one knife being arranged to lie opposite a short tooth of the other knife, two knifccarriers supporting said knives and adaptcd to be given a reciprocating movement towards and away from the rollers, means independent from the rcciprocatii'ig movement of the lmifc-carricrs for crossing the tcclh of the knives during their stri'ikc. towards the rollers in such manner that a lonetooth of one knife meshes with a short tooth ol' the other knife, and means imlcpcndcnt from the reciprocating movement of thc ltnifc-carricrs for opening the knivcs during; their stroke away from the rollcrs.

3. In a plaiting machine, in combination with the rollers of the machine, an upper continuous knife and a lower continuous knife, each knife having adjacent tcclh alternately long and short, cach lonetooth of one knife being arrangcd to lie opposite a short tooth of the other knife, two kni fc-carriers supporting said knives, two side plates at the ends of one lniifc-carrier, rotatable truunions carrying said side plates and adaptedio be given a reciprocating movcment to 'ards and away from lhc rollcrs, means adapted to swing about said trunnions said knife-carrier with its knife, :lXlcs rotatably mounted in said side plates and carrying the other kuifc, yielding means adapted to swing this latter knife towards the first knife, an arm secured to the second knife and guiding means for said arm adapt ed to remove said second knife away from the first knife against the action of said yielding means.

4. In a plaiting machine, in combination with the rollers of the machinc, an upper knife and a lower knife, two knil'wcarricrs carrying said knives and. adaptcd to be given areciprocating movement towards and away from the rollers and also an cndwisc movcmcnt perpendicular to said reciprocating movement and means for imparting said endwise movement to both lmifc-carricrs togather.

In a )ll1li lllg machine, in combination with the rollers of the machine, two knives adapted to be given a reciprocating move mcnt towards and, away from the rollers and also an cndwise movement llOl'lXlNllClllill' to said reciprocating movcmcnt, the working edges of said knives bein formed of teeth adapted to cross between the rollers and means for imparting said cndwise movement to said knives.

In testimony whereof we have sigrucd our names to this spccilimition.

GEORGES l lZBlQl il lNl. ROGER EZBELEN'VI.

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